You’re not working hard for that manager. You’re building a reputation you get to take with you.

It is easy to size your effort against whoever is supervising you, especially when they have not earned much. The habits and the record belong to you though, and they leave the building when you do. A manager gets a few months of it while you keep the skill, the reference and the knowledge that you can handle a job you did not love.

When the urge to coast arrives, ask what you want to be able to say about this place later. Work toward that answer instead of toward their standard.